Synonyms: O-(1 8-DIHYDROXY-3 6-DISULFONAPHTHYLENE-2 7-BISAZO)BISBENZENEARSONIC ACID;2,2'-[1,8-DIHYDROXY-3,6-DISULFO-2,7-NAPHTHALENE-BIS(AZO)DIBENZENEARSONIC ACID];2,2'-[1,8-DIHYDROXY-3,6-DISULFO-2,7-NAPHTHLENE-BIS(AZO)DIBENZENEARSONIC ACID;2,2'-(1,8-DIHYDROXY-3,6-DISULFONAPHTHYLENE-2,7-BISAZO)BISBENZENEARSONIC ACID;2,7-DI-O-(ARSONOPHENYLAZO)-1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONIC ACID;2,7-BIS(2-ARSONOPHENYLAZO)-1,8-DIHYDROXYNAPHTHALENE-3,6-DISULFONIC ACID;2,7-BIS(2-ARSONOPHENYLAZO)-1,8-DIHYDROXYNAPHTHALINE-3,6-DISULFONIC ACID;2,7-BIS(2-ARSONOPHENYLAZO)CHROMOTROPIC ACID